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Theoretical model of optical coherence tomography for system optimization and characterization.

Authors
  • Feng, Yinqi
  • Wang, Ruikang K
  • Elder, James B
Type
Published Article
Journal
Journal of the Optical Society of America. A, Optics, image science, and vision
Publication Date
Sep 01, 2003
Volume
20
Issue
9
Pages
1792–1803
Identifiers
PMID: 12968652
Source
Medline
License
Unknown

Abstract

We present a detailed analytical model to describe optical coherence tomography (OCT) systems, which considers the propagation of the optical field within a scattering medium in the framework of the extended Huygens-Fresnel principle. The model includes use of the discrete-particle model and the fractal approach in treating biological tissue as being packed with scattering particles with a power-law distribution. In contrast to previous models, an imaginary lens proximal to the tissue surface is introduced that approximates the real focusing lens in the sample arm of the OCT system. This treatment avoids the consideration of backscattering light as traveling in the free space between the focusing lens and the tissue surface before mixing with the reference beam. Experiments on tissue phantoms were carried out to verify the validity of this model.

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